Phosphorus cycle and significance on living system

1. PRESENTED BY,
RISHAV RAY
MSC SEM 3RD ,2ND YR
DES,VISVA BHARATI

2.  NON METAL
MEMBER OF NITROGEN FAMILY
COLOURLESS AT ROOM TEMPERATURE
SEMI TRANSPARENT,SOFT ANDWAXY SOLID
GLOWS IN THE DARK
12TH MOST ABUNDANT IN EARTH CRUST(CONTRIBUTION-0.10
WEIGHT PERCENTAGE)
THE CHIEF COMMERCIAL SOURCE IS PHOSPHORITE

4. A)MODEL
DIAGRAM OF THE
PHOSPHORUS
CYCLE

7. A) MINING LARGE QUANTITY OF
PHOSPHATE ROCK TO MAKE
COMMERCIAL INORGANIC
DETERGENTS
B) REDUCING THE AVAILABLE
PHOSPHATE IN SOILS BY CUTTING
DOWN FORESTS
C) DISCHARGES FROM SEWAGE
TREATMENT PLANT SYSTEMS
D)DISRUPTING AQUATIC SYSTEM WITH
PHOSPHATES FROM RUNOFF ANIMAL
WASTE AND FERTILIZERS

17. RECOMMENDED DAILY ALLOWANCE OF PHOSPHORUS-
1250mg/day(age 9-18)
750 mg/day(age 19-50)
Less than that amount may lead to
 INCREASED CELL DEATH
 IMPAIRED CELL SIGNALLING
 PREMATURE AGEING
 WEAK BONES
 TOOTH DECAY
 TROUBLE CONCENTRATING AND EXERCISING
 ANXIETY

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